CentOS7下安装MySQL5.7.39的详细过程
一、下载
下载地址：https://dev.mysql.com/downloads/mysql/
tar xvf mysql-5.7.39-1.el7.x86_64.rpm-bundle.tar
三、卸载已安装包
rpm -qa|grep mariadb
mariadb-libs-5.5.68-1.el7.x86_64
rpm -e --nodeps mariadb-libs-5.5.68-1.el7.x86_64
四、按顺序安装rpm包
rpm -ivh mysql-community-common-5.7.39-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.39-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.39-1.el7.x86_64.rpm
// 如果安装 mysql-community-server-5.7.39-1.el7 报 libaio.so.1 依赖错误，需先安装 libaio-0.3.109-13.el7.x86_64.rpm
rpm -ivh libaio-0.3.109-13.el7.x86_64.rpm
rpm -ivh mysql-community-server-5.7.39-1.el7.x86_64.rpm
安装 server 还可能报错：
rpm -ivh mysql-community-server-5.7.39-1.el7.x86_64.rpm
warning: mysql-community-server-5.7.39-1.el7.x86_64.rpm: Header V4 RSA/SHA256 Signature, key ID 3a79bd29: NOKEY
error: Failed dependencies:
net-tools is needed by mysql-community-server-5.7.39-1.el7.x86_64
执行以下命令安装 net-tools 解决：
yum install net-tools -y
五、启动
systemctl start mysqld
六、找到初始密码
cat /var/log/mysqld.log | grep 'password is generated'
alter user 'root'@'localhost' identified by 'xxxxxx';
grant all privileges on *.* to 'root'@'%' identified by 'xxxxxx' with grant option;
flush privileges;
八、开启防火墙，允许外网访问
firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --reload
firewall-cmd --list-ports
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